Fuse



May 30, 1933. E. B'. HUGHSON FUSE Filed April 29, 1931 ion/1N B.Hus/15am Y n'ron av v - A'rrolmiv cel Patented May 30, 1833 .umrsosnrasPATENT OFFICE mm a. nelson, or no menu, mrw roax rusn This inventionrelates to fuses for electric circuits.

An object of the invention is the provision of a fuse comprising a plugand a fuse proper which is readi y rep aceable in the plug.

Another b]00t is the provision o a fuse structure in which the fuseproper is in such relation to the plug that it W111 be held in tightcontact with a socket when the plug is inserted in the socket withoutemploying fastening means such as screws or solder to fasten the fuse tothe plug.

Other objects will be ap reciated by those skilled in the art upon reaing the following specification.

The invention will be fully and comprehensively understood from aconsideration of the following detailed description when read inconnection with the accompanying drawing which forms part of theapplication, with the understanding, however, vthat the improvement iscapable of extended application and is not confined to the exact showingof the drawing nor to the precise construction-described and, therefore,such changes and modifications may be made therefrom as do not affectthe spirit of the invention nor exceed the scope thereof as expressed inthe appended claim.

n the drawing: Fig. 1 is a side view of the fuse. Fig. 2 is a sectiontaken on line 22 of 1. ig. 8 is a be 111 plan view.

Fig. 4 is a top lan view; and

Fig. 5 is a perspective view of the proper before being (placed in theplug.

Referring to the swing for a more detailed description thereof, numeral7 indicates a plug which is preferably of insulating material such forexample as glass or perain. The lug is provided with a recess 8 and hasexterior threads 9 and a boss or protuberance 10 on the exterior of anend wall 11. The plug is provided with a transverse aperfuse 1881.lerlal' No. 588,771.

ture 12 extendin through the side wall of the plug from the t reads tothe recess 8. The plug is also provided with a slopin aperture orpassageway 14 extending from t e threads through the end wall 11 totheexterior of the theend wall at a point adjacent the protuberance 10.

The fuse pro r is shown in Fig. 5 and is designated b t e numeral 15.The fuse 15 comprises a ody portion 16 havin notches 17 at its sides toprovide a portion 0 reduced cross-sectional area. One end of the fusehas an enlarged round contact portion 18.

The fuse 15 is fplaced in the plug by pushing the end 19 o the fusethrough the aperture or passageway 14 of the plug from the lower endthereof and then fitting the body portion to one or more of the threads9 and passing the end 19 through the aperture 12 and bending itdownwardly into contact with a boundary portion of the recess 8. Theround contact portion 18 of the fuse may then be bent over onto theprotuberance 10. That portion of the fuse which has a reducedcrosssectional area by reason of the notches 17 lies in the aperture orpassageway 14; so that when the fuse blows at this reduced portion'rotection will be given by the bod of the p ug. No special fasteninmeans suc as screws or solder is needed to old the fuse in the plugsince the ends thereof are held by the latter. It will be readilyappreciated that when the plug is screwed lnto a socket that portion ofthe fuse which lies on the threads of the pin will be tightly heldbetween the plug an the socket. It will also be readily seen that thefuse may be readily replaced on account of the fact that no auxiliaryfastening means are employed. a e

What is claimed as new is:

A fuse plug comprising an exteriorl threaded body for insertion in afuse bloc and having a boss at one end disposed in the center of thelatter, and a fuse having a disk portion disposable against said boss,the body 2 mums hevinge recess therethrough entinelyploeed exceptadjacent said boss and et a. pomt intermediate the length of thethreads, the fun extending through said recess to have a pot- 6 tionthereof lylng exteriorly egaine't nid threads, the body of the fuseebove the t. where the letter leaves the recess formed with a rforetionin its well communiceting wit the interior of the body, 10 and theextremity of the fuse passing through this perforation.

In testimony whereof I hereby .5: my

signature. u EDWIN B. HUGHSON.

